Morrison’s scientific expertise resides in the fields of microbial physiology, genetics, and genomics, with a career-long focus on the gastrointestinal microbiota of humans and other herbivores. He is committed to the translation of microbial genomic and metagenomic datasets into a sound biological framework, producing novel diagnostic, organismal, and enzyme-based technologies. During his academic tenure in the USA, he led the team that produced the first genome sequences for gut Ruminococcus and Prevotella spp. Both genera are now widely acknowledged to play a key role in establishing human gut “enterotypes”. He returned to Australia in 2006 as a CSIRO Science Leader, leading the gut health stream of their Preventative Health Flagship Program, and one of CSIRO’s five Capability Platforms (in Transformational Biology). He joined the University of Queensland Diamantina Institute in October 2013 and created nationally unique infrastructure for microbe isolation in support of UQ’s germ-free and gnotobiotic small animal facility at the Translational Research Institute. He currently serves as science lead for gastrointestinal function with the Princess Alexandra Hospital’s Department of Gastroenterology and Hepatology and leads the microbiome research for the NHMRC Centre for Research Excellence in Digestive Health. He is also Australia’s science representative to the International Human Microbiome Consortium. He has ARC Discovery and Linkage grants and NHMRC project grants. He has an h-index of 65.